code: def test_cache_write_empty(self):
      base_test_dir = os.path.join(
          os.environ.get(
              "TEST_UNDECLARED_OUTPUTS_DIR", self.get_temp_dir()
          ),
          self._testMethodName,
      )
  
      with beam.Pipeline() as p:
          _ = {} | analyzer_cache.WriteAnalysisCacheToFS(
              p,
              base_test_dir,
              (analyzer_cache.DatasetKey("dataset_key_0"),),
          )
      self.assertFalse(os.path.isdir(base_test_dir))
  
file_path: transform/tensorflow_transform/beam/analyzer_cache_test.py
imports: import os
  import apache_beam
  from apache_beam.testing import util
  import numpy
  import tensorflow
  from tensorflow_transform import analyzer_nodes
  from tensorflow_transform import analyzers
  from tensorflow_transform.beam import analyzer_cache
  from tensorflow_transform import test_case
label_desc: Use image node_id 4 for calling the AnalyzerCacheTest obj's underlying member method code with example usage: obj.test_cache_write_empty() without return types